Audio Format
You can retrieve the current capture format for audio data or the size of the
audio format structure by sending the
WM_CAP_GET_AUDIOFORMAT message (or the
capGetAudioFormat and
capGetAudioFormatSize macros) to a capture window. The default audio capture format is mono, 8-bit,
11 kHz PCM (Pulse Code Modulation). When you retrieve the format by using
WM_CAP_GET_AUDIOFORMAT, always use the
WAVEFORMATEX structure.
You can set the capture format for audio data by sending the
WM_CAP_SET_AUDIOFORMAT message (or the
capSetAudioFormat macro) to a capture window. When setting the audio format, you can pass a
pointer to a
WAVEFORMAT,
WAVEFORMATEX, or
PCMWAVEFORMAT structure, depending on the specified audio format.
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